You hear about this mysterious invisible menace in many different contexts in life. On average you get 6 milliseverts per year. You get it from the air you breath, the water you drink, the food you eat, the people you spend time with, and even from space. Some cutting edge medical procedures use the properties of radiation to save lives. You'll be learning the different kinds of radiation and the many cryptic units used to describe them. You'll see where you get exposure to radiation and what situations you should be concerned about. Then, you'll be sent out with detectors to find sources of radiation.